WO2001010004A1 - Double power supply for electricity meter - Google Patents

Double power supply for electricity meter Download PDF

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Publication number
WO2001010004A1
WO2001010004A1 PCT/FR2000/002134 FR0002134W WO0110004A1 WO 2001010004 A1 WO2001010004 A1 WO 2001010004A1 FR 0002134 W FR0002134 W FR 0002134W WO 0110004 A1 WO0110004 A1 WO 0110004A1
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WO
WIPO (PCT)
Prior art keywords
voltage
capacitor
power supply
output
double power
Prior art date
Application number
PCT/FR2000/002134
Other languages
French (fr)
Inventor
Renaud Colson
Original Assignee
Schlumberger Industries S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schlumberger Industries S.A. filed Critical Schlumberger Industries S.A.
Priority to AU70078/00A priority Critical patent/AU7007800A/en
Publication of WO2001010004A1 publication Critical patent/WO2001010004A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
    • G01R29/0892—Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0083—Converters characterised by their input or output configuration
    • H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs

Definitions

  • the present invention relates to a double power supply for an electricity meter.
  • Modern electricity meters are electronic and have a power supply for the operation of the meter components. This supply most often draws its energy source from the electricity network itself and delivers a voltage of around five volts suitable for supplying said components.
  • these electricity meters have other functions than simply measuring electricity consumption.
  • the meter under the effect of a command transmitted via the network itself, or by any other means, and corresponding for example to a change in pricing, the meter triggers the switching on or off of a or several loads each consuming electrical power of the order of a few kilowatts.
  • a load can be a water heater for example. It is switched on or off via a power relay. The latter is triggered by means of a control signal emitted by a control circuit, most often a microprocessor.
  • the electrical supply of the relay must be capable of supplying high powers of the order of a few watts, for the duration of the control signal, namely one or more tens of milliseconds.
  • the power supply provided for supplying electronic components such as the microprocessor or a display does not allow this. Indeed, the power required during the switching of the relays being too high, there is a risk of short-circuit of the electrical supply and from there, a source of disturbance in the operation of the meter. It would be simple to add an auxiliary power supply specifically designed to supply the power relay (s). But adding an additional power supply would generate an unacceptable additional cost for the electricity meter.
  • the electrical power that can be consumed by the meter itself from the electricity network is limited by standards, such as the European standard EN61036. It is therefore necessary that the auxiliary power supply complies with the applicable standards.
  • the present invention allows the supply of the various electronic components of the meter including the power relay (s) while avoiding significant additional costs, while authorizing compliance with the standards relating to the electrical power that can be consumed by the meter itself from of the network.
  • It offers a double power supply making it possible to deliver both a first voltage for supplying electronic components and a second voltage for supplying one or more power relays from the same rectifier assembly connected to a chopper.
  • a block which can be described as an average, comprising an inductor forming part of an inductive voltage divider.
  • This inductive voltage divider makes it possible to obtain the first voltage, the second being obtained at the output of the averaging block.
  • the present invention relates to a double power supply for an electricity meter comprising a voltage rectifier intended to be connected to the electricity network and delivering a DC voltage at output, a chopper connected to the output of the rectifier and delivering at output a voltage in slots, a diode connected in parallel to the output of the chopper, a first inductance connected in series to the output of the rectifier, an assembly formed of a second inductance connected in series to a first capacitor, this assembly being connected on the one hand to the first inductor and to the electrical ground of the meter on the other hand, a first direct voltage being delivered in operation across the terminals of the first capacitor, an assembly connected in series to the first inductor and formed by a diode d input connected in series to an impedance, a second capacitor being connected on the one hand to the impedance and to the electrical ground counter risk on the other hand, a second direct voltage being delivered in operation across the second capacitor.
  • the impedance is a resistance.
  • the impedance is an inductance.
  • a Zener diode can be connected in parallel to the first capacitor.
  • a Zener diode can be connected in parallel to the second capacitor.
  • the first voltage used to supply the various electronic components outside the power relays must be stable.
  • a servo system can be provided to keep the first continuous voltage substantially constant by varying the interval between the slots from the chopper.
  • the present invention also relates to an electricity meter comprising such a double power supply.
  • Figure 1 schematically shows a double power supply according to the invention
  • Figure 2 schematically shows a servo system for dual power.
  • FIG. 1 schematically represents a double supply according to the invention.
  • a rectifier 10 is connected to the electricity distribution network. From the AC mains voltage, it delivers a DC voltage, for example of 300 V.
  • the voltage rectifier arrangements are well known to those skilled in the art and are therefore not described in detail here.
  • a chopper 12 is connected to the output of the rectifier 10.
  • a chopper can, for example, be of the type known under the brand Tiny Switch and sold by the company Power Intégrations.
  • This chopper 12 transforms the DC voltage delivered by the rectifier 10 into a series of voltage slots of width equal to approximately 2 ⁇ s, each of the slots being spaced from the next by a period which can range from 25 s to 1 ms depending on the power required. The value of this period is controllable according to the current absorbed by the components of the meter and we will see below the assembly allowing to carry out this command.
  • a diode 14 is connected in parallel to the output of the chopper 14. It ensures continuity of the current when the chopper does not deliver voltage, that is to say in the interval between two voltage slots.
  • a first inductor 16, for example of 470 H is connected in series to the output of the chopper 12 and an averaging block 18 is connected to this inductor.
  • the averaging block (18) comprises an assembly formed by a second inductor 20 for example of 220 H, connected in series to a first capacitor 22, having for example a capacity of 220 F.
  • This assembly is connected on the one hand to the first inductor 16 and to the electrical ground of the meter on the other hand so that the inductors 16 and 20 form an inductive voltage divider.
  • the voltage Vcc of around 5 V is supplied across the first capacitor 22.
  • a Zener diode 24 is connected in parallel to the terminals of the capacitor 22.
  • Vcc used to supply the various electronic components of the electricity meter (not shown), such as a display or microprocessor, it is kept constant by a servo system 26 connected to the terminals of the first capacitor 22 and connected to inputs of the chopper 12.
  • a servo system which can be used in the context of the invention is shown diagrammatically in FIG. 2.
  • a Zener diode 28 is connected in series to a resistor 30, for example of 220. Furthermore, the assembly consisting of the Zener diode 28 and resistor 30 is connected in parallel to the terminals of the first capacitor 22, the resistor 30 being connected to the electrical ground of the meter.
  • a light-emitting diode 32 is connected to the terminals of the resistor 30 and the light emitted controls the voltage between the collector and the emitter of a transistor 34 of the NPN bipolar type, the diode and the transistor advantageously being part of the same case of the type of that marketed by the company Siemens under the reference SFH615.
  • These means comprise an assembly connected in series with the first inductor 16 and formed by an input diode 36 connected in series with an impedance 38 which can be either a resistance for example of 220, or an inductor for example of lmH.
  • a second capacitor 40 having for example a capacity of 47F, is connected to the impedance 38 and to the electrical ground of the meter.
  • the DC voltage Vdd of a few tens of volts, for example between 30 and 40 V, is supplied across the second capacitor 40.
  • a Zener diode 42 is connected in parallel to the second capacitor 40 in order to avoid any risk of overvoltage. It is notable that the voltage Vdd has a residual ripple whose amplitude is approximately 0.01 V, which is perfectly negligible in the context of the intended use, namely the supply of a power relay.
  • the invention also relates to an electricity meter comprising such a double supply.

Abstract

The invention concerns a double power supply for an electricity meter comprising a voltage rectifier (10) to be connected on the power system and delivering a direct current voltage in output, a chopper controller (12) connected in output to the rectifier (10) and delivering in output a voltage in strobes, a diode connected in parallel to the chopper output, a first inductance (16) connected in series to the rectifier (10) output, an integrating circuit (18) comprising an inductance (20) connected in series to a first capacitor (22) so as to form an inductive voltage divider, a first direct current voltage being delivered to the terminals of the first capacitor (22), a second direct current voltage being delivered in output of the integrating circuit (18). The invention is applicable to electricity meters.

Description

DOUBLE ALIMENTATION POUR COMPTEUR D'ELECTRICITE DUAL POWER SUPPLY FOR ELECTRICITY METER
La présente invention se rapporte à une double alimentation pour compteur d'électricité.The present invention relates to a double power supply for an electricity meter.
Les compteurs d'électricité modernes sont électroniques et comportent une alimentation électrique permettant le fonctionnement des composants du compteur. Cette alimentation tire le plus souvent sa source d'énergie du réseau d'électricité lui- même et délivre une tension d'environ cinq volts apte à l'alimentation desdits composants.Modern electricity meters are electronic and have a power supply for the operation of the meter components. This supply most often draws its energy source from the electricity network itself and delivers a voltage of around five volts suitable for supplying said components.
Par ailleurs, ces compteurs d'électricité possèdent d'autres fonctions que la simple mesure d'une consommation d'électricité. En particulier, sous l'effet d'une commande transmise par l'intermédiaire du réseau lui-même, ou par tout autre moyen, et correspondant par exemple à un changement de tarification, le compteur déclenche la mise sous ou hors tension d'une ou plusieurs charges consommant chacune des puissance électriques de l'ordre de quelques kilowatts. Une telle charge peut être un chauffe-eau par exemple. Elle est mise sous ou hors tension par l'intermédiaire d'un relais de puissance. Ce dernier est déclenché par l'intermédiaire d'un signal de commande émis par un circuit de commande, le plus souvent un microprocesseur.In addition, these electricity meters have other functions than simply measuring electricity consumption. In particular, under the effect of a command transmitted via the network itself, or by any other means, and corresponding for example to a change in pricing, the meter triggers the switching on or off of a or several loads each consuming electrical power of the order of a few kilowatts. Such a load can be a water heater for example. It is switched on or off via a power relay. The latter is triggered by means of a control signal emitted by a control circuit, most often a microprocessor.
Mais l'alimentation électrique du relais doit être capable de fournir des puissances élevées de l'ordre quelques watts, pendant la durée du signal de commande, à savoir une ou plusieurs dizaines de millisecondes. Or l'alimentation électrique prévue pour alimenter les composants électroniques tel que le microprocesseur ou un afficheur, ne le permet pas. En effet, la puissance requise lors de la commutation des relais étant trop élevée, il y a un risque de court-circuit de l'alimentation électrique et de là, une source de perturbation dans le fonctionnement du compteur. Il serait simple d'ajouter une alimentation auxiliaire spécifiquement prévue pour alimenter le ou les relais de puissance. Mais ajouter une alimentation supplémentaire engendrerait un surcoût inacceptable du compteur d'électricité. De plus, la puissance électrique pouvant être consommée par le compteur lui-même à partir du réseau d'électricité est limitée par des normes, telle que la norme européenne EN61036. Il est donc nécessaire que l'alimentation auxiliaire respecte les normes applicables. La présente invention permet l'alimentation des différents composants électroniques du compteur y compris le ou les relais de puissance en évitant des surcoûts importants, tout en autorisant le respect des normes relatives à la puissance électrique pouvant être consommée par le compteur lui-même à partir du réseau.However, the electrical supply of the relay must be capable of supplying high powers of the order of a few watts, for the duration of the control signal, namely one or more tens of milliseconds. However, the power supply provided for supplying electronic components such as the microprocessor or a display does not allow this. Indeed, the power required during the switching of the relays being too high, there is a risk of short-circuit of the electrical supply and from there, a source of disturbance in the operation of the meter. It would be simple to add an auxiliary power supply specifically designed to supply the power relay (s). But adding an additional power supply would generate an unacceptable additional cost for the electricity meter. In addition, the electrical power that can be consumed by the meter itself from the electricity network is limited by standards, such as the European standard EN61036. It is therefore necessary that the auxiliary power supply complies with the applicable standards. The present invention allows the supply of the various electronic components of the meter including the power relay (s) while avoiding significant additional costs, while authorizing compliance with the standards relating to the electrical power that can be consumed by the meter itself from of the network.
Elle propose une double alimentation permettant de délivrer à la fois une première tension pour l'alimentation des composants électroniques et une seconde tension pour l'alimentation d'un ou plusieurs relais de puissance à partir d'un même ensemble redresseur connecté à un hacheur. Pour cela, elle utilise un bloc que l'on peut qualifier de moyenneur, comprenant une inductance faisant partie d'un diviseur de tension inductif. Ce diviseur de tension inductif permet l'obtention de la première tension, la seconde étant obtenue en sortie du bloc moyenneur.It offers a double power supply making it possible to deliver both a first voltage for supplying electronic components and a second voltage for supplying one or more power relays from the same rectifier assembly connected to a chopper. For this, it uses a block which can be described as an average, comprising an inductor forming part of an inductive voltage divider. This inductive voltage divider makes it possible to obtain the first voltage, the second being obtained at the output of the averaging block.
De manière plus précise, la présente invention concerne une double alimentation pour compteur d'électricité comprenant un redresseur de tension destiné à être connecté sur le réseau d'électricité et délivrant une tension continue en sortie, un hacheur connecté à la sortie du redresseur et délivrant en sortie une tension en créneaux, une diode reliée en parallèle à la sortie du hacheur, une première inductance reliée en série à la sortie du redresseur, un ensemble formé d'une seconde inductance reliée en série à un premier condensateur, cet ensemble étant connecté d'une part à la première inductance et à la masse électrique du compteur d'autre part, une première tension continue étant délivrée en opération aux bornes du premier condensateur, un ensemble relié en série à la première inductance et formé d'une diode d'entrée reliée en série à une impédance, un second condensateur étant relié d'une part à l'impédance et à la masse électrique du compteur d'autre part, une seconde tension continue étant délivrée en opération aux bornes du second condensateur.More specifically, the present invention relates to a double power supply for an electricity meter comprising a voltage rectifier intended to be connected to the electricity network and delivering a DC voltage at output, a chopper connected to the output of the rectifier and delivering at output a voltage in slots, a diode connected in parallel to the output of the chopper, a first inductance connected in series to the output of the rectifier, an assembly formed of a second inductance connected in series to a first capacitor, this assembly being connected on the one hand to the first inductor and to the electrical ground of the meter on the other hand, a first direct voltage being delivered in operation across the terminals of the first capacitor, an assembly connected in series to the first inductor and formed by a diode d input connected in series to an impedance, a second capacitor being connected on the one hand to the impedance and to the electrical ground counter risk on the other hand, a second direct voltage being delivered in operation across the second capacitor.
Selon un premier mode de réalisation, l'impédance est une résistance. Selon un autre mode de réalisation, l'impédance est une inductance. Pour limiter la tension aux bornes du premier condensateur, une diode Zener peut être reliée en parallèle au premier condensateur.According to a first embodiment, the impedance is a resistance. According to another embodiment, the impedance is an inductance. To limit the voltage across the first capacitor, a Zener diode can be connected in parallel to the first capacitor.
Pour limiter la tension aux bornes du second condensateur, une diode Zener peut être reliée en parallèle au second condensateur. La première tension utilisée pour l'alimentation des différents composants électroniques hors les relais de puissance doit être stable . A cet effet, on peut prévoir un système d'asservissement pour maintenir la première tension continue sensiblement constante en faisant varier l'intervalle entre les créneaux issus du hacheur.To limit the voltage across the second capacitor, a Zener diode can be connected in parallel to the second capacitor. The first voltage used to supply the various electronic components outside the power relays must be stable. To this end, a servo system can be provided to keep the first continuous voltage substantially constant by varying the interval between the slots from the chopper.
La présente invention concerne aussi un compteur d'électricité comprenant une telle double alimentation.The present invention also relates to an electricity meter comprising such a double power supply.
La présente invention sera mieux comprise à la lecture de la description qui suit, donnée à titre illustratif et non limitatif en référence aux dessins annexés dans lesquels :The present invention will be better understood on reading the description which follows, given by way of nonlimiting illustration with reference to the appended drawings in which:
• la figure 1 représente schématiquement une double alimentation selon l'invention ;• Figure 1 schematically shows a double power supply according to the invention;
" la figure 2 représente schématiquement un système d'asservissement pour la double alimentation."Figure 2 schematically shows a servo system for dual power.
La figure 1 représente schématiquement une double alimentation selon l'invention. Un redresseur 10 est connecté au réseau de distribution d'électricité. A partir de la tension alternative du réseau, il délivre une tension continue, par exemple de 300 V. Les montages de redresseur de tension sont bien connus de l'Homme du Métier et ne sont donc pas décrits en détail ici.FIG. 1 schematically represents a double supply according to the invention. A rectifier 10 is connected to the electricity distribution network. From the AC mains voltage, it delivers a DC voltage, for example of 300 V. The voltage rectifier arrangements are well known to those skilled in the art and are therefore not described in detail here.
Un hacheur 12 est relié à la sortie du redresseur 10. Un tel hacheur peut être par exemple du type de celui connu sous la marque Tiny Switch et commercialisé par la société Power Intégrations. Ce hacheur 12 transforme la tension continue délivrée par le redresseur 10 en une série de créneaux de tension de largeur égale à environ 2 μs, chacun des créneaux étant espacé du suivant par une période pouvant aller de 25 s à 1 ms selon la puissance nécessaire. La valeur de cette période est commandable en fonction du courant absorbé par les composants du compteur et nous verrons plus loin le montage permettant d'effectuer cette commande. Une diode 14 est connectée en parallèle à la sortie du hacheur 14. Elle permet d'assurer la continuité du courant lorsque le hacheur ne délivre pas de tension, c'est à dire dans l'intervalle entre deux créneaux de tension.A chopper 12 is connected to the output of the rectifier 10. Such a chopper can, for example, be of the type known under the brand Tiny Switch and sold by the company Power Intégrations. This chopper 12 transforms the DC voltage delivered by the rectifier 10 into a series of voltage slots of width equal to approximately 2 μs, each of the slots being spaced from the next by a period which can range from 25 s to 1 ms depending on the power required. The value of this period is controllable according to the current absorbed by the components of the meter and we will see below the assembly allowing to carry out this command. A diode 14 is connected in parallel to the output of the chopper 14. It ensures continuity of the current when the chopper does not deliver voltage, that is to say in the interval between two voltage slots.
Une première inductance 16, par exemple de 470 H est reliée en série à la sortie du hacheur 12 et un bloc moyenneur 18 est relié à cette inductance. Le bloc moyenneur (18) comprend un ensemble formé d'une seconde inductance 20 par exemple de 220 H, reliée en série à un premier condensateur 22, ayant par exemple une capacité de 220 F.A first inductor 16, for example of 470 H is connected in series to the output of the chopper 12 and an averaging block 18 is connected to this inductor. The averaging block (18) comprises an assembly formed by a second inductor 20 for example of 220 H, connected in series to a first capacitor 22, having for example a capacity of 220 F.
Cet ensemble est connecté d'une part à la première inductance 16 et à la masse électrique du compteur d'autre part de manière à ce que les inductances 16 et 20 forment un diviseur de tension inductif. La tension Vcc d'environ 5 V est délivrée aux bornes du premier condensateur 22.This assembly is connected on the one hand to the first inductor 16 and to the electrical ground of the meter on the other hand so that the inductors 16 and 20 form an inductive voltage divider. The voltage Vcc of around 5 V is supplied across the first capacitor 22.
Afin d'éviter toute surtension aux bornes du condensateur 22 provoquée par exemple par un dysfonctionnement, une diode Zener 24 est connectée en parallèle aux bornes du condensateur 22.In order to avoid any overvoltage at the terminals of the capacitor 22 caused for example by a malfunction, a Zener diode 24 is connected in parallel to the terminals of the capacitor 22.
Par ailleurs, la tension Vcc servant à alimenter les différents composants électroniques du compteur d'électricité (non représenté), tels qu'afficheur ou microprocesseur, celle-ci est maintenue constante par un système d'asservissement 26 connecté aux bornes du premier condensateur 22 et relié à des entrées du hacheur 12.Furthermore, the voltage Vcc used to supply the various electronic components of the electricity meter (not shown), such as a display or microprocessor, it is kept constant by a servo system 26 connected to the terminals of the first capacitor 22 and connected to inputs of the chopper 12.
Un système d'asservissement pouvant être utilisé dans le cadre de l'invention est représenté schématiquement en figure 2. Une diode Zener 28 est reliée en série à une résistance 30 par exemple de 220 . Par ailleurs, l'ensemble constitué de la diode Zener 28 et résistance 30 est connecté en parallèle aux bornes du premier condensateur 22, la résistance 30 étant reliée à la masse électrique du compteur.A servo system which can be used in the context of the invention is shown diagrammatically in FIG. 2. A Zener diode 28 is connected in series to a resistor 30, for example of 220. Furthermore, the assembly consisting of the Zener diode 28 and resistor 30 is connected in parallel to the terminals of the first capacitor 22, the resistor 30 being connected to the electrical ground of the meter.
Une diode électroluminescente 32 est reliée aux bornes de la résistance 30 et la lumière émise commande la tension entre le collecteur et l'émetteur d'un transistor 34 du type bipolaire NPN, la diode et le transistor faisant avantageusement partie du même boîtier du type de celui commercialisé par la société Siemens sous la référence SFH615.A light-emitting diode 32 is connected to the terminals of the resistor 30 and the light emitted controls the voltage between the collector and the emitter of a transistor 34 of the NPN bipolar type, the diode and the transistor advantageously being part of the same case of the type of that marketed by the company Siemens under the reference SFH615.
Lorsque la tension Vcc diminue à la suite d'une consommation plus importante des composants du compteurs, le courant traversant la diode électroluminescente 32, et donc l'intensité de la lumière qu'elle émet, diminue. La tension délivrée par le transistor 34 diminue d'autant. Cette tension est appliquée sur des entrées appropriées du hacheur 12, qui adapte l'écart temporel entre chaque créneau de tension délivré en sortie de manière à maintenir la tension Vcc constante. A nouveau en référence à la figure 1, on va maintenant décrire les moyens permettant d'obtenir la tension Vdd pour l'alimentation du relais de puissance (non représenté). Ces moyens comprennent un ensemble relié en série à la première inductance 16 et formé par une diode d'entrée 36 reliée en série à une impédance 38 qui peut être soit une résistance par exemple de 220 , soit une inductance par exemple de lmH. Un second condensateur 40 ayant par exemple une capacité de 47F, est relié à l'impédance 38 et à la masse électrique du compteur.When the voltage Vcc decreases as a result of a greater consumption of the components of the meters, the current passing through the light-emitting diode 32, and therefore the intensity of the light which it emits, decreases. The voltage delivered by the transistor 34 decreases accordingly. This voltage is applied to appropriate inputs of the chopper 12, which adapts the time difference between each voltage slot delivered at the output so as to keep the voltage Vcc constant. Again with reference to FIG. 1, we will now describe the means making it possible to obtain the voltage Vdd for supplying the power relay (not shown). These means comprise an assembly connected in series with the first inductor 16 and formed by an input diode 36 connected in series with an impedance 38 which can be either a resistance for example of 220, or an inductor for example of lmH. A second capacitor 40 having for example a capacity of 47F, is connected to the impedance 38 and to the electrical ground of the meter.
La tension continue Vdd de quelques dizaines de volts, par exemple entre 30 et 40 V, est délivrée aux bornes du second condensateur 40. Une diode Zener 42 est connectée en parallèle au second condensateur 40 afin d'éviter tout risque de surtension. Il est notable que la tension Vdd présente une ondulation résiduelle dont l'amplitude est d'environ 0,01 V ce qui est parfaitement négligeable dans le cadre de l'utilisation prévue, à savoir l'alimentation d'un relais de puissance.The DC voltage Vdd of a few tens of volts, for example between 30 and 40 V, is supplied across the second capacitor 40. A Zener diode 42 is connected in parallel to the second capacitor 40 in order to avoid any risk of overvoltage. It is notable that the voltage Vdd has a residual ripple whose amplitude is approximately 0.01 V, which is perfectly negligible in the context of the intended use, namely the supply of a power relay.
Par ailleurs, l'invention concerne aussi un compteur d'électricité comportant une telle double alimentation. Furthermore, the invention also relates to an electricity meter comprising such a double supply.

Claims

REVENDICATIONS
1. Double alimentation pour compteur d'électricité caractérisée en ce qu'elle comprend : un redresseur de tension (10) destiné à être connecté sur le réseau d'électricité et délivrant une tension continue en sortie, un hacheur (12) connecté à la sortie du redresseur (10) et délivrant en sortie une tension en créneaux, une diode (14) reliée en parallèle à la sortie du hacheur (12), une première inductance (16) reliée en série à la sortie du redresseur (10), un ensemble formé d'une seconde inductance (20) reliée en série à un premier condensateur (22), cet ensemble étant connecté d'une part à la première inductance (16) et à la masse électrique du compteur d'autre part, une première tension continue (Vcc) étant délivrée en opération aux bornes du premier condensateur (22), un ensemble relié en série à la première inductance (16) et formé d'une diode d'entrée (36) reliée en série à une impédance (38), un second condensateur (40) étant relié d'une part à l'impédance (38) et à la masse électrique du compteur d'autre part, une seconde tension continue (Vdd) étant délivrée en opération aux bornes du second condensateur (40). 1. Double power supply for electricity meter, characterized in that it comprises: a voltage rectifier (10) intended to be connected to the electricity network and delivering a DC voltage at output, a chopper (12) connected to the output of the rectifier (10) and outputting a voltage in slots, a diode (14) connected in parallel to the output of the chopper (12), a first inductor (16) connected in series to the output of the rectifier (10), an assembly formed of a second inductor (20) connected in series to a first capacitor (22), this assembly being connected on the one hand to the first inductor (16) and to the electrical ground of the meter on the other hand, a first direct voltage (Vcc) being supplied in operation across the first capacitor (22), an assembly connected in series with the first inductor (16) and formed by an input diode (36) connected in series with an impedance ( 38), a second capacitor (40) being connected on the one hand to the impedance (38) and to the electrical ground of the second counter, a second DC voltage (Vdd) being supplied in operation across the second capacitor (40).
2. Double alimentation selon la revendication 1 dans laquelle l'impédance (38) est une résistance.2. Double power supply according to claim 1 wherein the impedance (38) is a resistor.
3. Double alimentation selon la revendication 1 dans laquelle l'impédance (38) est une inductance.3. Double power supply according to claim 1 in which the impedance (38) is an inductance.
4. Double alimentation selon l'une quelconque des revendications précédentes dans laquelle une diode Zener (24) est reliée en parallèle au premier condensateur (22).4. Double power supply according to any one of the preceding claims in which a Zener diode (24) is connected in parallel to the first capacitor (22).
5. Double alimentation selon l'une quelconque des revendications précédentes dans laquelle une diode Zener (42) est reliée en parallèle au second condensateur (40).5. Double power supply according to any one of the preceding claims in which a Zener diode (42) is connected in parallel to the second capacitor (40).
6. Double alimentation selon l'une quelconque des revendications précédentes dans laquelle un système d'asservissement (26) est prévu pour maintenir la première tension continue (Vcc) sensiblement constante en faisant varier l'intervalle entre les créneaux issus du hacheur (12).6. Double power supply according to any one of the preceding claims in which a servo system (26) is provided to maintain the first continuous voltage (Vcc) substantially constant by varying the interval between the slots from the chopper (12) .
7. Compteur d'électricité caractérisé en ce qu'il comprend une double alimentation selon l'une quelconque des revendications précédentes. 7. Electricity meter characterized in that it comprises a double supply according to any one of the preceding claims.
PCT/FR2000/002134 1999-07-30 2000-07-25 Double power supply for electricity meter WO2001010004A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU70078/00A AU7007800A (en) 1999-07-30 2000-07-25 Double power supply for electricity meter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9910058A FR2797114B1 (en) 1999-07-30 1999-07-30 DUAL POWER SUPPLY FOR ELECTRICITY METER
FR99/10058 1999-07-30

Publications (1)

Publication Number Publication Date
WO2001010004A1 true WO2001010004A1 (en) 2001-02-08

Family

ID=9548829

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2000/002134 WO2001010004A1 (en) 1999-07-30 2000-07-25 Double power supply for electricity meter

Country Status (3)

Country Link
AU (1) AU7007800A (en)
FR (1) FR2797114B1 (en)
WO (1) WO2001010004A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6077668A (en) * 1983-09-30 1985-05-02 Hitachi Lighting Ltd Switching regulator
US4559594A (en) * 1983-11-25 1985-12-17 Adams Manufacturing Company Electrostatic air cleaner and high voltage power source therefor
JPH05103466A (en) * 1991-10-02 1993-04-23 Hitachi Ltd Switching power supply having many outputs
DE19508885A1 (en) * 1995-03-11 1996-09-12 Pepperl & Fuchs Electrical transformer-circuits peak voltage generation device
EP0757430A1 (en) * 1995-07-31 1997-02-05 Hewlett-Packard Company Regulation of second output of a switched mode power supply
EP0859453A2 (en) * 1997-02-14 1998-08-19 Switched Reluctance Drives Limited Power supply circuit for a control circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6077668A (en) * 1983-09-30 1985-05-02 Hitachi Lighting Ltd Switching regulator
US4559594A (en) * 1983-11-25 1985-12-17 Adams Manufacturing Company Electrostatic air cleaner and high voltage power source therefor
JPH05103466A (en) * 1991-10-02 1993-04-23 Hitachi Ltd Switching power supply having many outputs
DE19508885A1 (en) * 1995-03-11 1996-09-12 Pepperl & Fuchs Electrical transformer-circuits peak voltage generation device
EP0757430A1 (en) * 1995-07-31 1997-02-05 Hewlett-Packard Company Regulation of second output of a switched mode power supply
EP0859453A2 (en) * 1997-02-14 1998-08-19 Switched Reluctance Drives Limited Power supply circuit for a control circuit

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 220 (E - 341) 6 September 1985 (1985-09-06) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 460 (E - 1419) 23 August 1993 (1993-08-23) *

Also Published As

Publication number Publication date
FR2797114A1 (en) 2001-02-02
FR2797114B1 (en) 2001-09-21
AU7007800A (en) 2001-02-19

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